Here are the specs for the two sizes:
12-volt cigar lighter receptacle and plug, size A:
* Receptacle inside diameter: 20.93 - 21.01 mm (median 20.97 mm)
* Plug body diameter: 20.73 - 20.88 mm (median 20.805 mm)
* Most often used in American automobiles.
12-volt cigar lighter receptacle and plug, size B:
* Receptacle inside diameter: 21.41 - 21.51 mm (median 21.455 mm)
* Plug body diameter: 21.13 - 21.33 mm (median 21.18 mm)
* Most often used in European automobiles, and sometimes as a second socket in American automobiles expressly for DC power connections.
Radioshack does not show an adapter in their online catalog. I found no mention of it in the Valentine on-line manual. Still looking......
Anyone can make something complicated. It takes genius to make it simple. Einstein.
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